26 weeks and shortness of breath

So I'm 26 weeks pregnant today with Didi twins, and so far no complications, and yesterday and today I've been having shortness of breath while working (I'm always on my feet), and last PM I was having a hard time caughting my breathe just sitting on the couch, my chest felt a little heavy, and my heart rate was about 110 and ended up just going to bed because it made me feel better. Well I just called the nurse line at my OBs office to see if the had any suggestions just now, and they suggested going to the ER. From what I've been reading shortness of breathe is a common pregnancy symptom, and it feels a little extreme to rush to the ER over it. I just wanted to see other moms thoughts, and if anyone was also going through this, thanks.

My BP was 116/78

Also I would hate to go to the ER right now and give myself anymore covid exposure than I really had too...